Trevorrow Corporation manufactures and sells a single product. The company uses units as the measure of activity in its budgets and performance reports. During June, the company budgeted for 6,200 units, but its actual level of activity was 6,160 units. The company has provided the following data concerning the formulas used in its budgeting and its actual results for June: Data used in budgeting: Fixed element per month Variable element per unit Revenue - $ 27.80 Direct labor $ 0 $ 3.10 Direct materials 0 10.20 Manufacturing overhead 37,200 1.10 Selling and administrative expenses 22,800 0.30 Total expenses $ 60,000 $ 14.70 Actual results for June: Revenue $ 178,318 Direct labor $ 18,606 Direct materials $ 60,652 Manufacturing overhead $ 43,896 Selling and administrative expenses $ 24,688 The activity variance for net operating income in June would be closest to: Multiple Choice $524 F $524 U $9,256 U $9,256 F